# File lib/phusion_passenger/utils.rb, line 775
        def global_backtrace_report
                if Kernel.respond_to?(:caller_for_all_threads)
                        output = "========== Process #{Process.pid}: backtrace dump ==========\n"
                        caller_for_all_threads.each_pair do |thread, stack|
                                output << ("-" * 60) << "\n"
                                output << "# Thread: #{thread.inspect}, "
                                if thread == Thread.main
                                        output << "[main thread], "
                                end
                                if thread == Thread.current
                                        output << "[current thread], "
                                end
                                output << "alive = #{thread.alive?}\n"
                                output << ("-" * 60) << "\n"
                                output << "    " << stack.join("\n    ")
                                output << "\n\n"
                        end
                else
                        output = "========== Process #{Process.pid}: backtrace dump ==========\n"
                        output << ("-" * 60) << "\n"
                        output << "# Current thread: #{Thread.current.inspect}\n"
                        output << ("-" * 60) << "\n"
                        output << "    " << caller.join("\n    ")
                end
                return output
        end